| QUI | Quasi-Uniform Index | 准均匀指数 |
| QUI | Are your navigation lights working? | 你的导航灯工作吗？ |
| QUI | Queen Of Useless Instruments | 无用仪器女王 |
| QUI | Navigation Lights are Working (radiotelegraphy) | 导航灯工作（无线电报） |
| QUI | Quantitative Ultrasound Index (bone density) | 定量超声指数（骨密度） |
| QUI | QuichÉ (Guatemala territorial division) | QuichÉ (Guatemala territorial division) |